.tab-content {
  position: relative;
  width: 100%;
  height:-moz-calc(100% - 88px);
  height:-webkit-calc(100% - 88px);
  height: calc(100% - 88px);
  overflow: hidden;
}
.tab {
  position: absolute;
  width: 100%;
  height: 100%;
  left: 0;
  top: 0;
  background-color: #F1F1F1;
}
.tab iframe {
  width: 100%;
  height: 100%;
  border: 0;
}
